Replacement battery fits 9 Radiodetection compatible models. Specifications: 3.7V, Li-ion. Compatible with: RD8000, RD8100, Pipe Locators and RD7000+, RD8000 Marker Locators, RD8100 Cable, RD7100 and 3 more compatible models. Replaces: Radiodetection 09/ER3223Z13, Radiodetection 4LI-18650-1S4P-R1. Radiodetection replacement battery designed for Equipment/Survey/Test Charger devices.